Data sheet
Oxygen sensor
Applications:
Principle of Operation:
Medical
 Oxygen Concentrators
 Incubators
When voltage is applied to a zirconia
electrolyte cell, oxygen is pumped through
the zirconia disc from the cathode side to
the anode side because the carriers of the
current flowing through the zirconia
electrolyte are oxygen ions. By attaching a
cap with a pinhole on the cathode side of
the cell and by increasing the voltage over
the cell the current shows saturation due to
the rate limiting step in the transfer of
oxygen to the cathode. This saturation
current is called limiting current and is
nearly proportional to the ambient oxygen
concentration.
Laboratory
 Inert gas processing cabinets
(Glove boxes)
 Incubators (controlled bacterial
growth)
Food industry
 Packaging
 Controlled food testing
 Monitoring fruit ripening processes
(storage / transport)
Household/Gastronomy
 High-temperature
humidity
measurements (> 100 ° C) for
baking / roast automation
Below the advantages of the oxygen sensor:

measuring range 10 ppm to 96% oxygen

High accuracy

For many types a more or less linear characteristic

Small temperature dependence of the sensor signal

Low interference with other gases

Long service life

In many cases “Single point calibration“ necessary only once
Measuring technique
 Oxygen Meters (stationary /
portable)
 Measurements under controlled O2
content
 Air conditioning and ventilation
Security technology/Monitoring
 Fire protection (increased N2
atmosphere e.g. Server rooms)
 Greenhouses, wine cellar
 Gas storage, refineries
 Diving
 Fermentation units
(Electrical-) industry
 Inert gas processing machines and
cabinets
 Inert gas welding monitoring
 Storage with increased N2
atmosphere (oxidation prevention)
 Drying units
 Nitrogen concentrators
 Exhaust gas measurement
Schematic drawing of a sensor element
Several housing types
The information contained in this document is believed to be accurate and reliable but is presented without guarantee.
SENSORE Electronic GmbH
www.sensore-electronic.com
Aufeldgasse 37-39, A 3400 Klosterneuburg
[email protected]
Tel. +43 2243 450 0, Fax +43 2243 450 315
SO002e-3 / 21.04.2015
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Data sheet
Oxygen sensor
Characteristic Data:
Measuring gas
Oxygen concentration
Measuring medium
Gaseous atmosphere
Measuring principle
Limiting current type sensor
Measuring ranges
Type SO-xx-001
Type SO-xx-010
Type SO-xx-020
Type SO-xx-050
Type SO-xx-250
Txpe SO-xx-960
10 ppm
0,01
0,01
0,05
0,10
1,00
–
–
–
–
–
–
1000 ppm O2
1,0 vol.% O2
2,0 vol.% O2
5,0 vol.% O2
25,0 vol.% O2
96,0 vol.% O2
Details see paragraph: specifications
Output characteristic:
 [O ] 
Is(O2 )  k  ln 1  2 
 100 
Is (O2)
[O2]
k
Sensor current in A
Oxygen concentration in %
specific constant of sensor
Response time (t90)
2 to 25 sec. (Depends on: sensor type, gas flow, measuring chamber)
Sensor voltage / heating voltage / power consumption / heater cold resistance
Sensor voltage:
Heating voltage:
Power consumption:
Cold resistance:
0,7 to 1,6 Volt
3.6 – 4.4 Volts
1.3 to 1.8 Watts (depends on application and packaging)
R(25°C) = 3.25   0.20 
Warm up time
Min. 30 s
Maximum permissible operating temperature
350 °C (*)
*Depending on the cable and filter assembly (see paragraph: specification, Cable assembly)
Permissible volumetric flow rate (Purging the sensor)
For all sensor types, the maximum flow rate depends on the way of purging the sensor (sensor in direct gas flow, gas beam sha pe,
etc.) and the size of the measuring chamber. Exception: SO-E1-xxx (TO8 + hose connection for direct gassing). Permissible flow
[ml/min]: 100 - 500 (optimal: 250)
Lifetime (MTTF)
~ 20.000 hours (*)
*
Depending on measuring medium. Stated lifetime refers to a heated, operated sensor of type SO-xx-250 and SO-xx-960. A failure or
reaching the lifetime typically means a slight deviation from the dispatch specifications.
Vibration resistance
Sensors based on the TO8 socket as well as those built with a TO39 socket (SO-Bx-xxx, SO-Ex-xxx, SO-Ax-xxx) meet the European
Norm EN60068-2-6 (Sinusoidal vibration tests).
The information contained in this document is believed to be accurate and reliable but is presented without guarantee.
SENSORE Electronic GmbH
www.sensore-electronic.com
Aufeldgasse 37-39, A 3400 Klosterneuburg
[email protected]
Tel. +43 2243 450 0, Fax +43 2243 450 315
SO002e-3 / 21.04.2015
2/6
Data sheet
Oxygen sensor
Pin connection for different sensor types
Standard housing TO39 (Type SO-A0-xxx), TO8 (Type SO-Bx-xxx)
1
2
3
4
H+ (HS+)
H- (HS-)
Sen+
Sen-
(Pin-side view)
Sensors with connecting cable for 4-wire operation (SO-Bx-xxx-AxxxC, SO-Dx-xxx-AxxxC)
Sensors with connecting leads (teflon isolation with
temperature stability up to 250 °C):
Cable colour
Pin Connection
Violet 1
Violet 2
White 1
White 2
Red
Black
H+
HS+
HHS
Sen+
Sen-
Connected to
pin No.
1
2
3
4
Schematic drawing of sensor connection cable with
plug, view from backside of the plug
The information contained in this document is believed to be accurate and reliable but is presented without guarantee.
SENSORE Electronic GmbH
www.sensore-electronic.com
Aufeldgasse 37-39, A 3400 Klosterneuburg
[email protected]
Tel. +43 2243 450 0, Fax +43 2243 450 315
SO002e-3 / 21.04.2015
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Data sheet
Oxygen sensor
Specification:
Housing types
Type
SO-A0-xxx
SO-B0-xxx
SO-E2-xxx
SO-B1-xxx
Housing
TO39
TO8
Dimensions, remarks
 9.2 mm; H= 6.4 mm; pin distance 3.59 mm
 15.3 mm; H= 13.7 mm; pin distance 7.18 mm
 15.3 mm; H= 13.7 mm; pin distance 7.18 mm;
mounting holes (flange):  3.4 mm, distance 36 mm
Screw mountable housing with sintered M 16 * 1.5 mm L tot.= 49 mm; with connection cable
metal top
sintered metal top  12 mm, L= 20 mm, SW22
Screw mountable housing with sintered
M 10 * 1 mm L tot.= 43 mm; with connection cable
metal top
sintered metal top  12 mm, L= 20 mmm SW10
Aluminium-screw-mountable housing with M 16 * 1.5 mm L tot.= 47.4 mm; with connection cable
sintered metal filter
sintered metal filter  12.5 mm, SW22
TO8 with hose connection
 15,3 mm; H= 23,9 mm; pin distance 7,18 mm;
hose connection 4,8 mm
TO8 + mounting flange
SO-D0-xxx- xxxxx
SO-D1-xxx- xxxxx
SO-D2-xxx- xxxxx
SO-E1-xxx
Cable assembly
Type
SO-xx-xxx
Except:
SO-E1-xxx
SO-xx-xxx-A100C
SO-xx-xxx-A300C
Cable length [cm]
none
Operating temperature[°C]
350
Plug connector
none
none
100
300
250 (*)
200 (*)
200 (*)
none
Rast 2,5
Rast 2,5
* Operating temperature of the sensor is limited by the temperature resistance of the cable assembly or by the use of an optional Teflon filter.
Measuring ranges
Sensor type
SO-xx-001
SO-xx-010
SO-xx-020
SO-xx-050
SO-xx-250
SO-xx-960
*
Measuring range
10 ppm O2 – 1000 ppm O2
0.01 % O2 – 1.0 % O2
0.01 % O2 – 2.0 % O2
0.05 % O2 – 5.0 % O2
0.10 % O2 – 25.0 % O2
1.00 % O2 – 96.0 % O2
Output current
70 A – 140 A
150 A – 250 A
150 A – 250 A
150 A – 250 A
100 A – 200 A
15 A – 30 A
at gas composition
400 ppm O2 ,remainder N2
1.0 % O2 , remainder N2
2.0 % O2 , remainder N2
5.0 % O2 , remainder N2
20.9 % O2 , remainder N2 (air)
20.9 % O2 , remainder N2 (air)
Sensor
voltage
0.70 volt
0.75 volt
0.75 volt
0.80 volt
0.85 volt
1.60 volt
Code
A
H
B
C
D
E
Operation outside the specified measuring range can cause a permanent damage of the electrode.
Accuracy, reproducibility and response time
Sensor type
SO-xx-001 (*)
SO-xx-010
SO-xx-020
SO-xx-050
SO-xx-250
SO-xx-960
*
Accuracy
 20 ppm O2
 100 ppm O2
 200 ppm O2
 500 ppm O2
 0.25 % O2
 1.00 % O2
Reproducibility
< 10 ppm O2
< 100 ppm O2
< 100 ppm O2
< 250 ppm O2
< 0.1 % O2
< 0.2 % O22
Currently SO-D2-001 not available
Temperature of the housing during operation
Type
SO-Ax-xxx
SO-Bx-xxx
SO-Dx-xxx-xxxxx
Housing
TO39
TO8
Screw mounted housing
Max. temperature
250 °C
70 °C
70 °C
(Measured at ambient temperature of 25°C)
The information contained in this document is believed to be accurate and reliable but is presented without guarantee.
SENSORE Electronic GmbH
www.sensore-electronic.com
Aufeldgasse 37-39, A 3400 Klosterneuburg
[email protected]
Tel. +43 2243 450 0, Fax +43 2243 450 315
SO002e-3 / 21.04.2015
4/6
Data sheet
Oxygen sensor
Appendix: Housing types
Standard housings:
TO39 (SO-A0-xxx)
TO8 (SO-B0-xxx)
Screw mountable housings with sintered metal cap
SO-D0-xxx- xxxxx
SO-D1-xxx- xxxxx
The information contained in this document is believed to be accurate and reliable but is presented without guarantee.
SENSORE Electronic GmbH
www.sensore-electronic.com
Aufeldgasse 37-39, A 3400 Klosterneuburg
[email protected]
Tel. +43 2243 450 0, Fax +43 2243 450 315
SO002e-3 / 21.04.2015
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Data sheet
Oxygen sensor
Aluminium Screw mountable housings with sintered
metal filter
SO-D2-xxx- xxxxx (SW22)
TO8 housing with mounting flange
TO8 housing with hose connection (direct exposure to
gas)
SO-B1-xxx- xxxxx
SO-E1-xxx
The information contained in this document is believed to be accurate and reliable but is presented without guarantee.
SENSORE Electronic GmbH
www.sensore-electronic.com
Aufeldgasse 37-39, A 3400 Klosterneuburg
[email protected]
Tel. +43 2243 450 0, Fax +43 2243 450 315
SO002e-3 / 21.04.2015
6/6